Book/Report

FZJ-2019-03746

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Einfluß der Nanostrukturierung von Oberflächen auf das Wachstum dünner Filme

Diercks, V. B. (Corresponding author)FZJ*

1998
Forschungszentrum Jülich, Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/22414

Report No.: Juel-3542

Abstract: The physical and chemical properties of well definednanostructured surfaces are studied by means of thermal He atom scattering and thermal desorption spectroscopy. The main issues are to what extend the long range ordered, complex rare gas and molecular adlayers are influenced by the small domain size of the substrate structure and how the elemantary processes involved in adsorption and desorption depend on the size of the structures. By investigating the adsorption, the atomic or molecular structure and the growth as well as the kinetics of desorption of thin atomic and molecular films on a nanostructured model substrate novel „finite-size" effects were found and could be characterized in a systematic way. The Cu(110)-(2x1)O striped phase is used as model substrate. The Cu(110) surface reconstructs upon oxygen adsorption forming a striped phase with alternating Cu(110)(2 x 1)O stripes and clean Cu(110)-areas. The Cu-O stripes of this $\textit{self assembled}$ nanostructure are not only of the same width but also equally spaced. Their period can be tuned through the oxygen coverage between 6 and 14 nm. In addition, the striped phase is easy to prepare and as an $\textit{equilibrium}$ structure it is thermally stable. Physisorption and desorption of thin films does not destroy the structure of this phase. As a consequence, the Cu-O striped phase is suited very well as model substrate to study the special physical and chemical properties of nanostructured surfaces. Xenon (Xe), molecular nitrogen (N$_{2}$) and tetrafluormethan (CF$_{4}$) are chosen as adorbates species because their structure and dynamics on clean Cu(110) are well known from previous studies. The main result of the studies is that the Cu-0 striped phase can be used as a template to produce a regularly patterned monolayer of an atomic or molecular film with domain sizes reaching down to 2 nm. The driving force is the $\textit{preferential}$ adsorption of the particles on the Cu-O stripes or the selective desorption of the particles adsorbed on the clean Cu. [...]

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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